diff mbox series

[v20,08/41] usb: host: xhci-mem: Allow for interrupter clients to choose specific index

Message ID 20240425215125.29761-9-quic_wcheng@quicinc.com
State New
Headers show
Series Introduce QC USB SND audio offloading support | expand

Commit Message

Wesley Cheng April 25, 2024, 9:50 p.m. UTC 
Some clients may operate only on a specific XHCI interrupter instance.
Allow for the associated class driver to request for the interrupter that
it requires.

Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
 drivers/usb/host/xhci-mem.c       | 30 ++++++++++++++++--------------
 drivers/usb/host/xhci-sideband.c  |  4 ++--
 drivers/usb/host/xhci.h           |  2 +-
 include/linux/usb/xhci-sideband.h |  2 +-
 4 files changed, 20 insertions(+), 18 deletions(-)

Comments

Amadeusz Sławiński April 26, 2024, 1:24 p.m. UTC | #1 
On 4/25/2024 11:50 PM, Wesley Cheng wrote:
> Some clients may operate only on a specific XHCI interrupter instance.
> Allow for the associated class driver to request for the interrupter that
> it requires.
> 
> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
> ---

(...)

> -
> -	/* Find available secondary interrupter, interrupter 0 is reserved for primary */
> +	/* Find available secondary interrupter, interrupter 0 is reserverd for primary */

You introduce a typo in here.
Wesley Cheng April 26, 2024, 8:03 p.m. UTC | #2 
Hi Amadeusz,

On 4/26/2024 6:24 AM, Amadeusz Sławiński wrote:
> On 4/25/2024 11:50 PM, Wesley Cheng wrote:
>> Some clients may operate only on a specific XHCI interrupter instance.
>> Allow for the associated class driver to request for the interrupter that
>> it requires.
>>
>> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
>> ---
> 
> (...)
> 
>> -
>> -    /* Find available secondary interrupter, interrupter 0 is 
>> reserved for primary */
>> +    /* Find available secondary interrupter, interrupter 0 is 
>> reserverd for primary */
> 
> You introduce a typo in here.

Thanks for the review!  Will fix it.

Thanks
Wesley Cheng
diff mbox series

Patch

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index d686de0581b3..2b6ffd28a4a7 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2349,7 +2349,7 @@  xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir,
 }
 
 struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg)
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, int intr_num)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 	struct xhci_interrupter *ir;
@@ -2364,28 +2364,30 @@  xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg)
 		return NULL;
 
 	spin_lock_irq(&xhci->lock);
-
-	/* Find available secondary interrupter, interrupter 0 is reserved for primary */
+	/* Find available secondary interrupter, interrupter 0 is reserverd for primary */
 	for (i = 1; i < xhci->max_interrupters; i++) {
-		if (xhci->interrupters[i] == NULL) {
-			err = xhci_add_interrupter(xhci, ir, i);
-			break;
+		if ((intr_num > 0 && i == intr_num) || intr_num <= 0) {
+			if (xhci->interrupters[i] == NULL) {
+				err = xhci_add_interrupter(xhci, ir, i);
+				if (err) {
+					spin_unlock_irq(&xhci->lock);
+					goto free_ir;
+				}
+				break;
+			}
 		}
 	}
-
 	spin_unlock_irq(&xhci->lock);
 
-	if (err) {
-		xhci_warn(xhci, "Failed to add secondary interrupter, max interrupters %d\n",
-			  xhci->max_interrupters);
-		xhci_free_interrupter(xhci, ir);
-		return NULL;
-	}
-
 	xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n",
 		 i, xhci->max_interrupters);
 
 	return ir;
+
+free_ir:
+	xhci_free_interrupter(xhci, ir);
+
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(xhci_create_secondary_interrupter);
 
diff --git a/drivers/usb/host/xhci-sideband.c b/drivers/usb/host/xhci-sideband.c
index 6fdae9840c11..f3ca399ddc7c 100644
--- a/drivers/usb/host/xhci-sideband.c
+++ b/drivers/usb/host/xhci-sideband.c
@@ -278,7 +278,7 @@  EXPORT_SYMBOL_GPL(xhci_sideband_enable_interrupt);
  */
 int
 xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
-				 bool ip_autoclear)
+				 int intr_num, bool ip_autoclear)
 {
 	int ret = 0;
 
@@ -292,7 +292,7 @@  xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
 	}
 
 	sb->ir = xhci_create_secondary_interrupter(xhci_to_hcd(sb->xhci),
-			num_seg);
+			num_seg, intr_num);
 	if (!sb->ir) {
 		ret = -ENOMEM;
 		goto out;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 79dc3801d359..4068eafd26c3 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1838,7 +1838,7 @@  struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
 void xhci_free_container_ctx(struct xhci_hcd *xhci,
 		struct xhci_container_ctx *ctx);
 struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg);
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, int intr_num);
 void xhci_remove_secondary_interrupter(struct usb_hcd
 				       *hcd, struct xhci_interrupter *ir);
 void xhci_skip_sec_intr_events(struct xhci_hcd *xhci,
diff --git a/include/linux/usb/xhci-sideband.h b/include/linux/usb/xhci-sideband.h
index a749ae307ba7..1026502739c5 100644
--- a/include/linux/usb/xhci-sideband.h
+++ b/include/linux/usb/xhci-sideband.h
@@ -58,7 +58,7 @@  int xhci_sideband_enable_interrupt(struct xhci_sideband *sb, u32 imod_interval);
 
 int
 xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
-				 bool ip_autoclear);
+				 int intr_num, bool ip_autoclear);
 
 void
 xhci_sideband_remove_interrupter(struct xhci_sideband *sb);